本文介绍了ggplot2图中的主题元素的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我试图调整ggplot2图中的几个主题元素。我对此多层数字的三个问题/目标是(数据代码如下):
$ b $ ol <
  • 创建一个x轴刻度标记所有八年的标签,即2004 - 2011年。虽然我不想要'xlab'。

  • 从感染的茎图例中删除两个填充点b / c这些geom_bars不应该有与它们相关的点。


  • 将线条/点图例的图例标题更改为SOD-dead Stems。 $ b

    我的代码对许多人来说可能是多余的,所以随时随地提供建议,例如只有一个图例。我是ggplot的新手(喜欢它),但迄今为止在音阶方面遇到了麻烦...... b
    $ b




    我的代码FOR FIGURE:

      #####建立数据框:
    quag.infect = c(31,52, 58,74,76,85,99,102)
    quke.infect = c(10,13,17,20,23,27,28,27)
    qusp.hosts =(rep(c (QUAG,QUKE),每个= 8))
    year = rep(2004:2011,2)
    quag.dead = c(NA,4,11,19,33,38 ,48,49)
    quke.dead = c(NA,1,1,2,3,7,8)

    my.df = data.frame(Species = qusp .hosts,Year = year,
    Inf.ct = c(quag.infect,quke.infect),Sod.Dead = c(quag.dead,quke.dead))

    # ####为条形建立灰色:
    grays = c(QUAG =gray50,QUKE =gray66)

    #####制作多层图形:
    library(ggplot2)
    plot_x = ggplot(my.df,aes(Year,Inf.ct,fill = Species))+
    geom_bar(stat =identity,position =dodge )+
    ylab(表达式(茎数(dbh> =1-cm),sep =))+
    xlab()+
    scale_fill_手册(值=灰色,感染茎,标签= c(黑橡树,海岸活橡树))+
    geom_line(aes(y = Sod.Dead,linetype = Species))+
    geom_point(aes(y = Sod.Dead,shape = Species))
    plot_x






    谢谢,
    Sarah

    解决方案



    对于第1点:代替 xlab ,使用 scale_x_continuous ,设置中断,然后指定一个空标题。

    对于第二点:移动<$ c将全局 aes 函数中的$ c> fill = Species 转换为 aes 函数 geom_bar



    对于第3点:在 scale_shape scale_linetype 函数,确保同一个标题进入这两个函数。



    对代码进行这些更改对于ggplot:

    pre $ plot_x = ggplot(my.df,aes(Year,Inf.ct))+
    geom_bar(aes(fill =物种),stat =identity,position =dodge)+
    ylab(表达式(茎的数量(dbh> =1-cm),sep = ))+
    scale_x_continuous(,breaks = seq(2004,2011,1))+
    scale_fill_manual(values = grey,Infected Stems,labels = c(Black Oak海岸活橡树))+
    geom_line(aes(y = Sod.Dead,linetype = Species))+
    geom_point(aes(y = Sod.Dead,shape = Species))+
    scale_shape(SOD-dead Stems)+
    scale_linetype(SOD-dead Stems)
    plot_x

    给出以下图表:


    I am trying to tweak a few thematic elements in a ggplot2 figure. My three questions/goals for this multi-layered figure are (code for data follows at end):

    1. Create a x-axis tick mark label for all eight year, i.e., 2004-2011. I do not want a 'xlab' though.
    2. Remove the two filled dots from the "Infected Stems" legend b/c these "geom_bars" should not have dots associated with them (???).
    3. Change the Legend Title for the lines/points legend to "SOD-dead Stems".

    My code is probably redundant to many of you, so feel free to provide suggestions anywhere, such as having only a single legend. I am new to ggplot (like it) but have trouble with "scales" thus far....


    MY CODE FOR FIGURE:

    ##### BUILD UP DATAFRAME:
    quag.infect= c(31, 52, 58, 74, 76, 85, 99, 102)
    quke.infect= c(10, 13, 17, 20, 23, 27, 28, 27)
    qusp.hosts = (rep(c("QUAG", "QUKE"), each=8))
    year = rep(2004:2011, 2)
    quag.dead = c(NA, 4,  11, 19, 33, 38, 48, 49)
    quke.dead = c(NA,  1,  1,  1,  2,  3,  7,  8)
    
    my.df = data.frame(Species=qusp.hosts, Year=year,
    Inf.ct = c(quag.infect, quke.infect), Sod.Dead=c(quag.dead, quke.dead))
    
    ##### Establish grey colors for bars:
    grays = c(QUAG="gray50", QUKE="gray66")
    
    ##### Make multi-layered graphic:
    library(ggplot2)
    plot_x = ggplot(my.df, aes(Year, Inf.ct, fill=Species)) +
      geom_bar(stat="identity", position="dodge") +
      ylab(expression("Number of stems (dbh">="1-cm)", sep="")) +
      xlab("") +
      scale_fill_manual(values=grays, "Infected Stems", labels = c("Black Oak", "Coast Live           Oak")) +
      geom_line(aes(y=Sod.Dead, linetype=Species)) +
      geom_point(aes(y=Sod.Dead, shape=Species))
    plot_x
    


    Thanks,Sarah

    解决方案

    You're not far off.

    For point 1: In place of xlab, use scale_x_continuous, setting the breaks, and specifying an empty title.

    For point 2: Move fill = Species out of the global aes function into an aes function for geom_bar.

    For point 3: Change the legend title within scale_shape and scale_linetype functions, making sure the same title goes into both.

    Making these changes to the code for ggplot:

    plot_x = ggplot(my.df, aes(Year, Inf.ct)) +
      geom_bar(aes(fill=Species), stat="identity", position="dodge") +
      ylab(expression("Number of stems (dbh">="1-cm)", sep="")) +
      scale_x_continuous("", breaks = seq(2004, 2011, 1)) +
      scale_fill_manual(values=grays, "Infected Stems", labels = c("Black Oak", "Coast Live Oak")) +
      geom_line(aes(y=Sod.Dead, linetype=Species)) +
      geom_point(aes(y=Sod.Dead, shape=Species)) +
      scale_shape("SOD-dead Stems") +
      scale_linetype("SOD-dead Stems")
    plot_x
    

    gives the following plot:

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  • 06-05 20:43